That's a tall order. First make sure you keep your yard free of tall grasses, weeds, this is where fleas live. Keep your grass short.
Garden supply stores sell microscopic worms called NEMATODES. These will eat immature fleas & other insects. Nothing is permanent, so after rains may need reapplication. You mix the "worms" with water, put in a yard sprayer and spray all areas of the yard thoroughly.
Hope this & my answers to your other posted question pertaining to your dog flea problem will help. Good luck & give the dog a hug from this animal lover. I own 7 dogs & 3 horses and I, also, try not to use anything in their care that can be harmful to them. With the recent pet contamination scare I have gone to only buying dry dog food from feed stores & making broths using chicken(which I shred into broth ), meat scraps from butcher(do same as with chicken) adding to dry food. I do this in lieu of mixing with canned dog food.
Garden supply stores sell microscopic worms called NEMATODES. These will eat immature fleas & other insects. Nothing is permanent, so after rains may need reapplication. You mix the "worms" with water, put in a yard sprayer and spray all areas of the yard thoroughly.
Hope this & my answers to your other posted question pertaining to your dog flea problem will help. Good luck & give the dog a hug from this animal lover. I own 7 dogs & 3 horses and I, also, try not to use anything in their care that can be harmful to them. With the recent pet contamination scare I have gone to only buying dry dog food from feed stores & making broths using chicken(which I shred into broth ), meat scraps from butcher(do same as with chicken) adding to dry food. I do this in lieu of mixing with canned dog food.